<template>
  <div class="app-container">
    <!-- header区域 -->
    <mt-header fixed title="vue项目">
        <span slot="left" @click="goback" v-show="flag">
          <mt-button icon="back">返回</mt-button>
        </span>
    </mt-header>
    <!-- router-view区域 -->
    <transition name='fade'>  
      <router-view></router-view>
    </transition>

    <!-- tabbar区域 -->
    <nav class="mui-bar mui-bar-tab">
        <router-link class="mui-tab-item-yy" to="/home">
          <span class="mui-icon mui-icon-home"></span>
          <span class="mui-tab-label">首页</span>
        </router-link>
        <router-link class="mui-tab-item-yy" to="/member">
          <span class="mui-icon mui-icon-contact"></span>
          <span class="mui-tab-label">会员</span>
        </router-link>
        <router-link class="mui-tab-item-yy" to="/shopcard">
          <span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{$store.getters.getAllCount}}</span></span>
          <span class="mui-tab-label">购物车</span>
        </router-link>
        <router-link class="mui-tab-item-yy" to="/search">
          <span class="mui-icon mui-icon-search"></span>
          <span class="mui-tab-label">搜索</span>
        </router-link>
    </nav>
  </div>
</template>

<script>
import { Header } from 'mint-ui';
import './lib/mui/css/mui.min.css';
import './lib/mui/css/icons-extra.css';
import './lib/mui/fonts/mui-icons-extra.ttf';

export default {
  data() {
    return {
      flag: false
    };
  },
  created() {
    this.flag = this.$route.path === '/home' ? false : true;
  },
  components: {
    mtHeader: Header
  },
  methods: {
    goback() {
      // 点击后退
      this.$router.go(-1);
    }
  },
  watch: {
    '$route.path': function(newval,oldval){
      if (newval === '/home') {
        this.flag = false;
      } else {
        this.flag = true;
      }
    }
  },
}
</script>

<style lang="scss" scoped>
  .mint-header {
    z-index: 99;
  }
.app-container {
  padding-top: 40px;
  padding-bottom: 50px;
  overflow-x: hidden;
}

.fade-enter {
  transform: translateX(100%);
  opacity: 0;
}
.fade-leave-to {
  /* transition: all 0.5s cubic-bezier(0,0,1,1);
  opacity: 0; */
  transform: translateX(-100%);
  opacity: 0;
  position: absolute;
} 

.fade-enter-active, .fade-leave-active {
  transition: all 0.5s ease;
  opacity: 1;
}

// 改类名，解决 tabbar 点击无法切换的问题
.mui-bar-tab .mui-tab-item-yy.mui-active {
    color: #007aff;
}

.mui-bar-tab .mui-tab-item-yy {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}

.mui-bar-tab .mui-tab-item-yy .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}

.mui-bar-tab .mui-tab-item-yy .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>
